Festa, Gaetano (2009) A Local Magnitude Scale for Southern Italy. [Pubblicazione in rivista scientifica]

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Item Type: Pubblicazione in rivista scientifica
Language: English
Title: A Local Magnitude Scale for Southern Italy
Creators:
CreatorsEmail
Festa, GaetanoUNSPECIFIED
Autor/s: A. Bobbio, M. Vassallo, G. Festa
Date: 2009
Number of Pages: 10
Department: Scienze fisiche
Identification Number: 10.1785/0120080364
Official URL: http://www.bssaonline.org/cgi/content/abstract/99/...
Journal or Publication Title: BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
Date: 2009
Volume: 99
Number: 4
Page Range: pp. 2461-2479
Number of Pages: 10
Uncontrolled Keywords: Sismologia, reti sismiche, analisi dati
Identification Number: 10.1785/0120080364
Date Deposited: 21 Oct 2010 06:57
Last Modified: 30 Apr 2014 19:43
URI: http://www.fedoa.unina.it/id/eprint/7533

Abstract

local magnitude scale has been defined for southern Italy, in the area monitored by the recently installed Irpinia Seismic Network. Waveforms recorded from more than 100 events of small magnitude are processed to extract synthetic Wood–Anderson traces. Assuming a general description of peak-displacement scaling with the distance, by means of linear and logarithmic contributions, a global exploration of the parameter space is performed by a grid-search method with the aim of investigating the correlation between the two decay contributions and seeking for a physical solution of the problem. Assuming an L2 norm, we found M=logA+1.79 log R - 0.58 yielding an error on the single estimation smaller than 0.2, at least when the hypocenter location is accurate. Station corrections are investigated through the station residuals, referring to the average value of the magnitude. Using a z test, we found that some stations exhibit a correction term significantly different from 0. The use of the peak acceleration and peak velocity as indicators of the magnitude is also investigated.

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